The Bellas are back in this month's Pitch Perfect 3 [1], and as much as we feel like we can't wait to see the cast reunited [2], we really can't wait to hear them. The fun of the Pitch Perfect movies is in the songs the group chooses to sing a capella [3], and they've introduced us to new favorite songs [4] over the years — or totally made old favorites sound new. Case in point is Sia's "Cheap Thrills," which the Bellas perform in the film and which we exclusively have a clip of. Watch the Bellas perform the recent classic and get excited for the release on Dec. 22!
